.center {
  text-align: center;
}

section {
  height: 100vh;
}

/* NAVIGATION */
nav {
  width: 100%;
  margin: 0 auto;
  padding: 4px 0;
  /*box-shadow: 0px 5px 0px #dedede;*/
}
nav ul {
  list-style: none;
  text-align: center;
  padding-left:0;
  margin:0;
}
nav ul li {
  display: inline-block;
}
nav ul li a {
  display: block;
  padding: 10px;
  text-decoration: none;
  color: #aaa;
  font-weight: 400;
  /*text-transform: uppercase;*/
  margin: 0 0px;
}
nav ul li a,
nav ul li a:after,
nav ul li a:before {
  transition: all .3s;
}
nav ul li a:hover {
  color: #555;
}


/* stroke */
nav.stroke ul li a,
nav.fill ul li a {
  position: relative;
}
nav.stroke ul li a:after,
nav.fill ul li a:after {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  margin: 0;
  width: 0%;
  content: '.';
  color: transparent;
  background: #aaa;
  height: 1px;
}
nav.stroke ul li a:hover:after {
  width: 100%;
}

nav.fill ul li a {
  transition: all 1s;
}

nav.fill ul li a:after {
  text-align: left;
  content: '.';
  margin: 0;
  opacity: 0;
}
nav.fill ul li a:hover {
	/* Color of hover link in header nav */
	color: #3099fd;
	z-index: 1;
}
nav.fill ul li a:hover:after {
  z-index: -10;
  animation: fill 1s forwards;
  -webkit-animation: fill .8s forwards;
  -moz-animation: fill .8s forwards;
  opacity: 1;
}

/* Keyframes */
@-webkit-keyframes fill {
  0% {
    width: 0%;
    height: 1px;
  }
  50% {
    width: 100%;
    height: 1px;
  }
  100% {
    width: 100%;
    height: 100%;
	/* Color of animated hover background in header nav */
    background: #d7d5d8;
  }
}

/* Keyframes */
@-webkit-keyframes circle {
  0% {
    width: 1px;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
    height: 1px;
    z-index: -1;
    background: #450310;
    border-radius: 100%;
  }
  100% {
    background: #aaa;
    height: 5000%;
    width: 5000%;
    z-index: -1;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    border-radius: 0;
  }
}